Sweet Sweat Stick for $19.30(expired)
Looks like an interesting deal to help fitness goals.
As shown in their promo video apply the Sweet Sweat product to your skin before a workout to help the body sweat more.
For the next few hours, Amazon is selling the 6.4oz stick for $19.29
(normally about $30 to $33).
There are several articles about the benefits of sweating promoting better circulation, such as this one and this one.